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TRIVIAL NAMES. 



Costatum 



Cardissa 



Hemicardium 



Aculeatum 



Echinatum 



Isocardia 



Edule 



Fragum 



^Eolicum 



Unedo 



Magnum 



Retusum 



Rustic um 



Mactka 

 Lutraria 



DONAX 



Scortum 

 Trunculus 

 Faba 

 Irus 



Venus 

 Dione 

 Paphia 



White-fluted Heart. 



Venus Heart. 



Ditto with smooth edge. 



Knotted H.; Ox H. 



Rake H. Shell. 



Rasp Cockle. 



Common Do. 



White Strawberry Do. 



Janus. 



Strawberry Do. 



Yellow, ribbed Do. 



Diana Heart. 



Bear's Paw; Tufted H. 



Mactra, 



Large M. 



Wedge Shell. 

 Beaked W. 

 Yellow Do. 

 Bean-shaped Do. 

 Foliated Do. 



Venus Shell. 

 Prickly-mouthed V. 

 Oldwoman ; wrinkled V. 



